Multiscale nano-integration in the scarf-bonded patches for enhancing the performance of the repaired secondary load-bearing aircraft composite structures

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dc.authorid0000-0003-0461-6905
dc.authorid0000-0003-0259-2655
dc.authorid0000-0003-4423-6202
dc.authorid0000-0002-0726-2420
dc.authorid0000-0002-4295-8634
dc.authorid0000-0002-3204-6746
dc.contributor.authorSerra, Topal
dc.contributor.authorAl-Nadhari, Abdulrahman
dc.contributor.authorYildirim, Ceren
dc.contributor.authorBeylergil, Bertan
dc.contributor.authorKan, Cihan
dc.contributor.authorUnal, Serkan
dc.contributor.authorYildiz, Mehmet
dc.date.accessioned2026-01-24T12:31:07Z
dc.date.available2026-01-24T12:31:07Z
dc.date.issued2023
dc.departmentAlanya Alaaddin Keykubat Üniversitesi
dc.description.abstractThis study investigates a novel approach of improving the mechanical performance of scarf-repaired carbon fiber reinforced composites by integrating nanomaterials in the patch constituents. Two distinct types of carbon-based nanomaterials, thermally exfoliated graphene oxide grade-2 (TEGO) and Epocyl T 128-06 (MWCNT) are integrated into the patch resin matrix and fiber/matrix interface in an upscaled manner. Another group of composites are repaired with pristine patches in accordance with the existing and prevalent composite repair method. Compared to the reference panel, 109.9%, 99.7% and 99.3% stiffness recoveries are achieved for the patches with CNT and TEGO-incorporated resin matrices and TEGO-electrosprayed fibers, respectively. Location-wise analyses of the test data show that the stiffness, strength, Poisson's ratio, and strain values depend on the number of patch plies in each specimen. Fractographic inspections show that the failure sites shift towards the outer areas of the scarf region demonstrating an enhanced stress redistribution due to the nanomaterials. SEM observations show that nanoparticles affect toughening mechanisms based on the type, location, and alignment of the nano-reinforcement, which in turn limits the shear-dominated failures (SDF) in the baseline and pristine patch repair system. In CNT- and TEGO-reinforced resin patches, efficient crack bridging and fracture plane tilting/twisting or crack bifurcations are observed whereas the electrosprayed TEGO particles positioned at the perimeter of fibers operate as a shield for the fibers to prevent SDFs. These findings demonstrate that failure behavior of repair systems and therefore their mechanical performance are governed by the type of nanoreinforcement and its integration process.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [215M116]
dc.description.sponsorshipThis work was financially supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under the grant number 215M116 as a dual collaboration program with Germany
dc.identifier.doi10.1016/j.carbon.2022.12.056
dc.identifier.endpage125
dc.identifier.issn0008-6223
dc.identifier.issn1873-3891
dc.identifier.scopus2-s2.0-85144600995
dc.identifier.scopusqualityQ1
dc.identifier.startpage112
dc.identifier.urihttps://doi.org/10.1016/j.carbon.2022.12.056
dc.identifier.urihttps://hdl.handle.net/20.500.12868/5655
dc.identifier.volume204
dc.identifier.wosWOS:000909339500001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofCarbon
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260121
dc.subjectPolymer-matrix composites (PMCs)
dc.subjectComposite repair
dc.subjectGraphene oxide
dc.subjectCNT
dc.subjectMechanical properties
dc.titleMultiscale nano-integration in the scarf-bonded patches for enhancing the performance of the repaired secondary load-bearing aircraft composite structures
dc.typeArticle

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